APPLICATION OF CROSSLINKING POLYMER TECHNIQUE IN SHENGLI OILFIELD

Crosslinking polymer technique related with profile control and driving can enhance oil recovery largely.Compared with polymer flooding, this technique not only increase solution viscosity, resistance force coefficient and residual resistance factor, but also modify heterogeneity.This technique will be used for crosslinking polymer flooding, and also will improve polymer flooding by adding crosslinker in low-pressure well of polymer-injection band.Additionally crosslinking polymer can be used to control water shutoff deep profiles through increase solution, concentration and intensity.Tests on crosslinking polymer flooding in 19 fault block of Gudao Oilfield and tests on adding crosslinker to polymer-injection low pressure well in Shengli Oilfield show that crosslinking polymer has stronger adsorptive power and occlusion compared with polymer flooding.Crosslinking polymer also can inhibit polymer channeling, modify reservoir heterogeneity and enhance oil recovery effectively.